/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * 
 */

package org.apache.jmeter.protocol.http.control;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.Enumeration;
import java.util.Vector;

import org.apache.jmeter.config.ConfigTestElement;
import org.apache.jmeter.testelement.property.CollectionProperty;
import org.apache.jmeter.util.JMeterUtils;
import org.apache.jorphan.util.JOrphanUtils;

/**
 * This class provides an interface to headers file to pass HTTP headers along
 * with a request.
 * 
 * author <a href="mailto:giacomo@apache.org">Giacomo Pati</a>
 * @version $Revision: 535138 $ $Date: 2007-05-04 10:29:15 +0100 (Fri, 04 May 2007) $
 */
public class HeaderManager extends ConfigTestElement implements Serializable {

	public static final String HEADERS = "HeaderManager.headers";// $NON-NLS-1$

	private final static int columnCount = 2;

	private final static String[] columnNames 
    = { JMeterUtils.getResString("name")// $NON-NLS-1$
        , JMeterUtils.getResString("value") };// $NON-NLS-1$

	/**
	 * Apache SOAP driver does not provide an easy way to get and set the cookie
	 * or HTTP header. Therefore it is necessary to store the SOAPHTTPConnection
	 * object and reuse it.
	 */
	private Object SOAPHeader = null;

	public HeaderManager() {
		setProperty(new CollectionProperty(HEADERS, new ArrayList()));
	}
    
    public void clear() {
        super.clear();
        setProperty(new CollectionProperty(HEADERS, new ArrayList()));
    }

	public CollectionProperty getHeaders() {
		return (CollectionProperty) getProperty(HEADERS);
	}

	public int getColumnCount() {
		return columnCount;
	}

	public String getColumnName(int column) {
		return columnNames[column];
	}

	public Class getColumnClass(int column) {
		return columnNames[column].getClass();
	}

	public Header getHeader(int row) {
		return (Header) getHeaders().get(row).getObjectValue();
	}

	/**
	 * Save the header data to a file.
	 */
	public void save(String headFile) throws IOException {
		File file = new File(headFile);
		if (!file.isAbsolute()) {
			file = new File(System.getProperty("user.dir")// $NON-NLS-1$ 
                    + File.separator + headFile);
		}
		PrintWriter writer = new PrintWriter(new FileWriter(file));
		writer.println("# JMeter generated Header file");// $NON-NLS-1$
		for (int i = 0; i < getHeaders().size(); i++) {
			Header head = (Header) getHeaders().get(i);
			writer.println(head.toString());
		}
		writer.flush();
		writer.close();
	}

	/**
	 * Add header data from a file.
	 */
	public void addFile(String headerFile) throws IOException {
		File file = new File(headerFile);
		if (!file.isAbsolute()) {
			file = new File(System.getProperty("user.dir")// $NON-NLS-1$ 
                    + File.separator + headerFile);
		}
		BufferedReader reader = null;
		if (file.canRead()) {
			reader = new BufferedReader(new FileReader(file));
		} else {
			throw new IOException("The file you specified cannot be read.");
		}

		String line;
		while ((line = reader.readLine()) != null) {
			try {
				if (line.startsWith("#") || line.trim().length() == 0) {// $NON-NLS-1$
					continue;
				}
				String[] st = JOrphanUtils.split(line, "\t", " ");// $NON-NLS-1$ $NON-NLS-2$
				int name = 0;
				int value = 1;
				Header header = new Header(st[name], st[value]);
				getHeaders().addItem(header);
			} catch (Exception e) {
				throw new IOException("Error parsing header line\n\t'" + line + "'\n\t" + e);
			}
		}
		reader.close();
	}

	/**
	 * Add a header.
	 */
	public void add(Header h) {
		getHeaders().addItem(h);
	}

	/**
	 * Add an empty header.
	 */
	public void add() {
		getHeaders().addItem(new Header());
	}

	/**
	 * Remove a header.
	 */
	public void remove(int index) {
		getHeaders().remove(index);
	}

	/**
	 * Return the number of headers.
	 */
	public int size() {
		return getHeaders().size();
	}

	/**
	 * Return the header at index i.
	 */
	public Header get(int i) {
		return (Header) getHeaders().get(i).getObjectValue();
	}

	/*
	 * public String getHeaderHeaderForURL(URL url) { if
	 * (!url.getProtocol().toUpperCase().trim().equals("HTTP") &&
	 * !url.getProtocol().toUpperCase().trim().equals("HTTPS")) { return null; }
	 * 
	 * StringBuffer sbHeader = new StringBuffer(); for (Iterator enum =
	 * headers.iterator(); enum.hasNext();) { Header header = (Header)
	 * enum.next(); if (url.getHost().endsWith(header.getDomain()) &&
	 * url.getFile().startsWith(header.getPath()) && (System.currentTimeMillis() /
	 * 1000) <= header.getExpires()) { if (sbHeader.length() > 0) {
	 * sbHeader.append("; "); }
	 * sbHeader.append(header.getName()).append("=").append( header.getValue()); } }
	 * 
	 * if (sbHeader.length() != 0) { return sbHeader.toString(); } else { return
	 * null; } }
	 */

	/*
	 * public void addHeaderFromHeader(String headerHeader, URL url) {
	 * StringTokenizer st = new StringTokenizer(headerHeader, ";"); String nvp;
	 *  // first n=v is name=value nvp = st.nextToken(); int index =
	 * nvp.indexOf("="); String name = nvp.substring(0, index); String value =
	 * nvp.substring(index + 1); String domain = url.getHost();
	 * 
	 * Header newHeader = new Header(name, value); // check the rest of the
	 * headers while (st.hasMoreTokens()) { nvp = st.nextToken(); nvp =
	 * nvp.trim(); index = nvp.indexOf("="); if (index == -1) { index =
	 * nvp.length(); } String key = nvp.substring(0, index);
	 * 
	 * Vector removeIndices = new Vector(); for (int i = headers.size() - 1; i >=
	 * 0; i--) { Header header = (Header) headers.get(i); if (header == null) {
	 * continue; } if (header.getName().equals(newHeader.getName())) {
	 * removeIndices.addElement(new Integer(i)); } }
	 * 
	 * for (Enumeration e = removeIndices.elements(); e.hasMoreElements(); ) {
	 * index = ((Integer) e.nextElement()).intValue(); headers.remove(index); }
	 *  }
	 */
	public void removeHeaderNamed(String name) {
		Vector removeIndices = new Vector();
		for (int i = getHeaders().size() - 1; i >= 0; i--) {
			Header header = (Header) getHeaders().get(i).getObjectValue();
			if (header == null) {
				continue;
			}
			if (header.getName().equalsIgnoreCase(name)) {
				removeIndices.addElement(new Integer(i));
			}
		}

		for (Enumeration e = removeIndices.elements(); e.hasMoreElements();) {
			getHeaders().remove(((Integer) e.nextElement()).intValue());
		}
	}

	public String getClassLabel() {
		return JMeterUtils.getResString("header_manager_title");// $NON-NLS-1$
	}

	/**
	 * Added support for SOAP related header stuff. 1-29-04 Peter Lin
	 * 
	 * @return the SOAP header Object
	 */
	public Object getSOAPHeader() {
		return this.SOAPHeader;
	}

	/**
	 * Set the SOAPHeader with the SOAPHTTPConnection object. We may or may not
	 * want to rename this to setHeaderObject(Object). Concievably, other
	 * samplers may need this kind of functionality. 1-29-04 Peter Lin
	 * 
	 * @param header
	 */
	public void setSOAPHeader(Object header) {
		this.SOAPHeader = header;
	}
}
